1. This is a 7-in-1 multifunctional chain measuring ruler specially designed for mountain bikes, integrating multiple bicycle maintenance functions into one. 2. Seven practical functions: Presta valve extension rod disassembly and assembly / Presta valve core disassembly and assembly / 14G spoke wrench / thread diameter measurement / length measuring ruler / chain wear detection / chain hook 3. Chain wear detection: This tool is mainly used to measure the wear degree of bicycle chains. It is equipped with indicator points at 0.75% and 1.0% to help determine when the chain needs to be replaced. 4. Weight: approx. 33g 5. Dimensions: 125 x 42 x 2mm
